Lamp-socket.



W. P. ANKLAM.

LAMP SOCKET.

APPLIOATION FILED MAY 26, 1913.

sTATEs Param-*formen WILLIAM F. ANR-LAM, O DETROIT, MICHIGAN, SSIGNOR TOC. M. HALL LAMP COMP-ANY, '0F DETROIT, MICHIGAN, A CORPORATION 0FMICHIGAN.

LAMP-SOCKET.

-Specification o'f Letters Patent.

Patent-ed Dee. so, 191s.

-Application led May 26, 1913. Serial No. 769,927.

To all 'whom t 'may concern:

Be it known that I, WILLIAM F. ANKLAM, a citizencf the United States ofAmerica, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements inLamp-Sockets, of which the following is a specicajaiom'reference beinghad therein to 'the accompanying. drawings.

lll/Ly invention relates to lamp sockets and resides 4in the -novelconstruction of the 'socket whereby the illuminant may be easily andaccurately focused in relation to the reflector; in a' construction inwhich twisting' of -the wires r leads that are operatively y connected,to the plug will be eliminated; in

adjusted means for retaining the socket'parts in their osition; and incertain arrangements'- and constructions of parts as will more fullyhereinafter appear? In the drawings,-Figure 1 is a fragmentary sectionthrough a lamp having my improved socket applied thereto; and Fig.

2 is an enlarged, central, longitudinal section through the plug.4

A designates the outer casing of the lamp.

. .and B the relector'therein, herein shown as f with the reflector.

parabolic form. C is the lamp globe or illuminant, arranged within thereflector.

It is very desirable-in order to obtain the best etliciency of theilluminant--th-t the latter is in proper focus in relation to thereflector, and as the -filaments in lamp globes of the same size vary asto their focal point, it is necessary to have the socket for t-he lampglobe or other illuminant'so constructed that it may be moved intoproper'tocus In the present construction this `is accomplished byproviding a relative, rotary movement between the socket parts. In thestructure shown in the drawings the lamp bulb C is carried lby a plug Dwhich has a screw-threaded engagement with a mounting or bearing portionof the socket, suitably attached to a support. Preferably this mount-ingcomprises a sleeve E attached to and carried by the reliector and havingan opening-therein alining with an opening in the base of the reliector.Thus the plug may be adjusted to vary the position ofthe lluminantbymerely turning the plug, and the turning of the latter may beaccomplished by revolving the globe tion without damage to theelectrical leads F G, I have devised a novel construction of socketwhich will allow of the turning of the plug within the sleeve any numberof revolutions. Thus, 'H is an insulating core or body-which is providedwith bores I J extending longitudinally thereof. Arranged sleeve K bymeans of an insulating ring O.-

The sleeve N is attached to the other terminal P in a manner similar tothat described in connection with the sleeve K, and this sleeve N isalso insulated from the socket portion which receives the lamp globe, bya ring R of insulating material.

The member Q has in inwardly-extend-v ing liange S upon which is seatedthe head T of the core H. In assembling the parts the core is insertedthrough the member Q, until the head T thereof engages its seat S, andwhen the sleeves N .K are secured in place by the pins M the severalparts are rigidly connected together against longitudinal displacement.In order to prevent relative rotation between the portion Qpand the coreH the lat-ter is preferably secured to the former by means of a pin U.

The sleeve E within which the plug is arranged, is provided with socketsV IV slightly spaced and internally threaded to receive the threadedends X of insulating members Y which carry the terminals Z that areelectrically connected to the wires F G that lead to the source ofelectrical current, The members Z are spring-pressed and when the partsare as shown in Fig. 1 the outer ends of the members Z are yieldablypressed in engagement respectively with the sleeves K N, therebyestablishing electrical connection between one of the members Z and theterminal P through the In order to permit of this turning acmedium ofthe'pin M and the sleeve N, and between the other members Z and theterminal L through the medium of the pin M and sleeve K.. The sl'eeves KN are of sut' ficient width to permit of the necessary -longitudinaladjustment of the plug during the adjustment of the members E in effectforming brushes that during all positions of adjustment remain i contactwith their respective sleeves. Furthermore, when the plug has been movedto an adjusted position, the action of the springs upon the members Zwill exert a sufficient pressure upon the plug to avoid accidentalrotation of the latter, due to jarring or the like.

' Vhile I have shown and described a desirable form of my invention itis readily apparent that the=same is susceptible of variousmodifications, and I do not desire to limit my protection to thestructure shown, but consider the invention sufiiciently broad to embodyvarious modifications thereof.

lVliat I claim as my invention is l. In a lamp socket, the combinationof a plug comprising a lamp-receiv'iing socket portion, terminalsarranged in said socket portion, an insulating core carrying saidterminals, spaced metallic bands upon said core', insulating materialinterposed between the adjacent ends of said bands, means forelectrically connecting each of said bands with` one of the'terminals, asleeve within which said plug is arranged for longitudinal and rotaryadjustment, contact sockets on said sleeve, and spring-pressed contactsin said sockets respectively engaging said metallic bands.

i 2. The combination of a reflector cfa lamp, a plug having alamp-receiving socket portion formed as a unit therewith, a terminalcarried by the plug extending into the socket portion, a bearing for theplug arranged to position the lamp-receiving socket in operativerelation to the reflector, a screw threaded engagement between thebearing and the plug for permitting the adjustmentv of the socketportion relative to the reflector, and means Jfor holding the plug andbearing in any position of relative adjustment.

3. The combination of a ref-lector of a lamp, a plug having alamp-receiving. socket portion formed as a unit therewith, a terminalcarried bythe plug arranged to position the lamp-receiving socket inoperative relation to the reflector, a screw-threaded 'engagementbetween the bearing and the plug for permittingthe adjustment of thesocket portion relative to the refiector, and yielding means forreleasably holding the. plug and bearing against relative movement.

4. Thefcombination of a reflector of a lamp, a plug member having alamp-receiving socket portion,la terminal carried by the plug andprojecting into'the socket portion,

a bearing for the plug arranged to position 5. The combination of areflector of a lamp, a plug member having a lamp-receiving socketportion, a terminal carried by the. plug and projecting into the socketportion, a tearing for the plug arranged to p0 sition the lamp-bulbengaging portion in operative relation to thc ref iector, an engagementbetween the bearing and plug for effecting upon a relative rotation ofthe plug and bearing` a longitudinaltadjustment of tlie'plug relative-to the reflector, a contact carried by one ot said members yieldably'pressed into engagement with the other member and acting to yieldablyretain the plug and bearing members against relative adjustment,`and-means for electrically connecting said terminal and'contact.

6. rlrhe combination of a reflector of a lamp, a plug member having alamp-receiving socket portion, a terminal carriedl by the plug andarranged in operative relation to the socket portion, a bearing memberfor the plug arranged to position the lampbulb engaging portion inoperative relation to the reflector, a connection between the plug andthe bearing for effecting upon a ,relative rotation a longitudinalmovement of the plug relative to the refiector, a conducting surface onone of said members electrically connected to 'said terminal, and acontact on the other of said membersin electrical engagement with saidconducting surface in various positions of relative adjustment of saidmembers, the engagement between the contact and conducting sur-.tacesserving to retain the plug and bearing in their positions ofadjustment.

7. The combination of a refiector of a lamp, a plug member having alamp-receiv ing socket portion, a terminal carried by the plug andarranged in operative rel'ation to the socket portion, a bearing member,for theplug arranged to position the lampbulb engaging portion'inoperative relation to the refiector, a connection'between the plug andthe bearing for effecting upon a relative rotation a longitudinalmovement of the plug relative to the reflector, a con'- ducting surfaceon one' of said members electrically connected to said terminal, and Aaspring-pressed contact on the other of said members yieldably engagingsaid conduct- Locaties adjustment of said members 'and acting toyieldably retain the plug and bearing in their various positions ofadjustment.

8. The combination off a. reflector 'of' a lamp, a pluginember havingalamp-receiving socket portion, a terminal carried by the plug andarranged in operative relation to the socket portion, a 'bearing memberfor the plug arranged to position the lainpbulb engaging portion inoperative relation to the. reflector, a connection between the plug andthe bearing for effecting upon a relative rotation a longitudinalmovement of the plug relative to the refiector, an endless conductingsurface on one of said members, an electrical. connection between saidsurface and the terminal, and a springpressed contact carried by theother of said members and engaging said endless conducting surface.

9. The combination of a reflector of a lamp, a plug having alamp-receiving socket portion, a terminal carried by the plug andprojecting into the socket, a bearing for the plug arranged to positionthe lamp-bulb engaging portion in operative relation to.the reflector,an engagement between the plug and the bearing for effecting upon arelative rotation a longitudinal adjustment. of the plug relative to therefiector, an endless metallic surfacev on the plug electricallyconnected. to the terminal, and a spring-pressed i contact carried bythe bearing and yieldably engaging said endless surface in variouspositions of adjustment of the plug and bearing.

10. The coml'iinatioii of a Ireflector of a lamp, a plug having alamp-receiving socket portion, a terminal carried by the plug andprojecting into the socket, a bearing for the plug, comprising astationary sleeve arranged to position the lamp-bulb engaging portion inoperative relation to the refiector, a connection between the plug andsleeve for effecting upon a relative rota`v tion a longitudinaladjustment of the plug relative to the refiector, an endless-metallicsurface on the plug electrically connected to said terminal, and aspring-pressed Contact carried by the. sleeve and fixed in relationthereto. said contact yieldably engaging the endless metallic surface ofthe plug in various positions of adjustment of the plug and sleeve andacting to releasably retain the socket and sleeve against relativerotation.

11. The combination of' reflector of a lamp, a plug having alamp-receiving socket portion, a terminal carried by tlie plug andpi'ciecting into the socket, a bearing for tlif LJlug, comprising astationary sleeve arranged to position the lamp-bulb engaging portion inoperative relation to the reflector, a connection between the plug andsleeve for effecting upon a relative rotation a lon- .infr

gitudinal adjustment of the plug relative to the reflector, an endlessmetallic band encircling the plug and electrically connected to saidterminal, and a spring-pressed con` tact carried by the sleeve.projecting laterally therethrough into engagement with the metallicband whereby an electrical connection is established between saidterminal 'and said cont-act in various positions of adjustment of theplug and sleeve.

12. The combination of a reflector of a lamp, a plug having alamp-receiving socket portion, a pair of terminals carried by the plugand projecting into the socket .portion, a pair of endless metallicsurfaces on the plug insulated the one from the other, means forelectrically connecting said surfaces respectively with said terminals,a sleeve within which said plug is positioned, said sleeve beingarranged to positionthe lamp-bulb engaging portion inoperative relationto the reflector, an engagement between the plug and sleeve foreffecting upon a relative rotation a longitudinal adjustment of the plugrelative to the refiector, and a pair of terminals carried by saidsleeve and respectively engaging said endless metallic surfaces;

. 13. The combination of a reflector of a` tion relative to thereflector, a contact cari'ied by and fixed in relation to the,bear

g, and means for maintaining an electrical connection between theterminal and contact in various positions of adjustment of the plug` andbearing.

14. The combination of a reflector of a lamp, a plug having alamp-receiving socket portion, a terminal carried by the plug andpositioned in operative relation to the socket portion, a bearing forthe plug non-rotatably mounted and arranged to position the lamp-bulbengaging portion in operative re lation to the refiector, a connectionbetween the plug and bearing for effecting a longitudinal adjustment ofthe plug relative to the bearing, a contactfixed in relation to thebearing, and means carried by the plug for electrically connecting saidcontact and said terminal.

15. The combination. of a 'reiector of a lamp, a plug having alamp-receiving socket portion, a terminal carried by the plug andprojecting into the socket portion, a sleeve carried by and fixed inrelation to the reiiector and Within which saidv plug is arranged, aconnection between said sleeve vand plug for eectingvupon a rotation of'WILLIAM F. ANKLAM.

Witnesses:

WM. J .f BEL'KNAP, JAMEs P. BARRY.

the plug a longitudinal adjustment of .the socket portion relative tothe reflector, a Contact carried by the sleeve and means-for maintainingan -electrical connection between said terminal and said Contact in thevarious positions of adjustment of said plug.

Copies of this patient may be obtained for ve cents each, by addressingthe Commissioner of latents,

Washington, D. C.

